Fluorescent tube



FIG. 1 is a front view of the fluorescent tube showing my new invention;

FIG. 2 is a bottom view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a right side view thereof. 

The ornamental design for a fluorescent tube, as shown and described. 